Wrist watch alarm



March 1949- A. B. CHRISTENSEN 2,463,087

WRIST WATCH ALARM Filed Dec. 26, 1947 INVENTOR,

flu 91mins B. ('hris bensen By L I l I Patented Mar. 1, 1949 WRIST WATCH ALARM Augustus Bernhardt Christensen, South Bethlehem, Pa.

Application December 26, 194?, Serial No. 793,902

5 Qlaims.

Thisinvention relates to wrist watch alarms.

An object of the invention is the provision of an alarm for wrist watches in which a key for rotating a shaft ofthe alarm is slidable on said shaft and is adapted to be moved outwardly against the wrist of the wearer, the rotation of the key by the shaft against the wrist when the alarm has, been released causing the wearer to be disturbed into wakefulness.

Another object of the invention is the provision of an alarm for wrist watches in which a spring depressed slidable key for rotating the shaft that winds the actuating spring of the alarm is moved against the wrist of the wearer by fixed cams when the shaft and ke are reversely rotated by the released actuating spring.

A further object of the invention is the provision of an alarm for wrist watches in which a disturbing means is revolved by the actuating spring of the alarm when said alarm has been Figure 3 is an enlarged fragmentary side view of an attachment connected with the alarm and shown in an operative position for pressing against the wrist of the wearer of the watch, and

Figure 4 is an enlarged fragmentary side view of the attachment shown in an inoperative position.

Referring more particularly to the drawing l0 designates a wrist watch having the rear face ll of a casing l2 spaced from the wrist of the wearer. A collar l3 connected to or formed integrally with the casing l2 projects rearwardly and has a flanged peripheral edge M for contact with the wrist of the wearer. The collar forms an open ended housing for various finger pieces l5 and 56 that actuate respective stems I! and I8. The stem I! is employed for correcting variations in the timing While stem l8 controls the setting of the alarm. The collar also houses a manual means for Winding the alarm and an agitating means for arousing the wearer of the wrist watch as will be presently explained.

The casing of the watch is provided with the usual slotted lugs 2i for receiving connectors on the ends of a wrist band (not shown). A stem 22 projects from the casing l2 and is provided with a manipulating knob 23 for winding the main spring of the Watch.

A shaft or stem 25 projects through aligned passages in the back of the watch. and in a disk 26. The projecting portion of the shaft is fiat and is received by an elongated slot 2'! in a key 28 which is slidable on said shaft. The disk 26 is secured to the rear face of the casing ill by threaded bolts 29 passing through perforations in diametrically disposed tongues 3!) on the disk 26 and threaded into perforations in the back I! of the casing 83. The key 28 is in the form of a bar 3i having outstanding wings 32 to be grasped by the fingers of the operator when winding the actuating spring 3%; of the alarm.

A coil spring 35 received by the outer end of the shaft 25 has one end pressing against the bar 3| while the other end presses against a head 36 on the free end of said shaft. The spring 35 retains the key 28 normally inwardly of the collar 13 and in contact with the disk 38.

A- plurality of cam members ii! are mounted on the disk 26 in spaced relation at the periphcry of said disk. The spacing of the cam members is such that the spring 35 will maintain the key 28 in contact with the disk 25 in an inoperative position between the cams.

The operation of my device is as follows: The key 28 is rotated in the direction as indicated by the arrow in Figure l for winding the spring 33 which operates the alarm. Such winding however, takes place after the knob it has been rotated to set the time for the release of the alarm. During the rotation of the key 28, said key will ride over the cams ll).

When the alarm is released at the time set, the shaft 25 will be reversely rotated from that indicated by the arrow in Figure 1. At this time the bar iii of the key 23 will ride over the cams til against the tension of the spring 35 and will also be revolved by the shaft 25. The height of the cams is such that the wings 32 of the key will be forced beyond a plane passing through the periphery of the curved flange M of the collar l3 and will engage the wrist of the wearer of the watch. Due to the rising and falling of the wings 32 with key 28, a considerable agitation will be created on the wrist thereby causing the wearer to be awakened.

What I claim:

1. A wrist watch having a casing, a spring actuated alarm comprising a flat stem for winding the alarm projecting from the back of the casing, a key having an elongated slot received by the stem and slidable thereon, a head on the free end of the stem, a coil spring on the stem and disposed between the head and the key for maintaining the key inwardly against the back of the casing, and cams projecting outwardly from the back of the casing and engaged by the key for causing said key to ride outwardly on the stem during rotation of the stem when the alarm has been released until said key contacts the wrist of the wearer.

2. In a wrist watch having a casing, a spring actuated alarm comprising a stem projecting from the back of the casing, a collar projecting from the back of the casing and housing the stem, a key slidably connected to the stem for rotating said stem and adapted to be projected beyond the outer or free end of the collar, a resilient means normally maintaining the key inwardly against the back of the casing and cams projecting outwardly from the back of the casing and engageable with the key for forcing the key outwardly of the collar and against the wrist of the wearer during the rotation of the key and stem when the alarm has been released.

3. In a wrist watch having a casing, a spring actuated alarm mounted in the casing comprising a flat stem projecting from the back of the casing for winding the alarm spring, a collar projecting outwardly from the periphery of the back of the casing and housing the stem, the free end of the collar being adapted to engage the wrist of the wearer, a key provided with a central slot received by the shaft and slidable on said shaft, wings on the key adapted to be grasped by the fingers of the operator when winding the alarm spring, spaced cams projecting outwardly from the back of the casing and surrounding the stem and a spring pressing the key against the back of the'casing, said key being disposed between the cams, said key riding over the cams during rotation of the stem and key when the alarm spring has been released for projecting the rotating wings outwardly of the collar and against the wrist of the wearer.

4. In a wrist watch having a casing, a spring actuated alarm mounted in the casing comprising a stem projecting from the back of the casing for winding the alarm spring, a key having the central portion slidably connected to the stem, a wing attached to the key at each side of the stem and projecting outwardly from the back of the casing, a collar extending rearwardly from the back of the casing and having the open free end flanged for engagement with the wrist of the wearer, said collar normally housing the wings on the key, a resilient means for maintaining the key and wings within the confines of the collar when the alarm is set, and cams on the back of the casing located in the path of the key so that when the alarm spring has been released said key will ride on the cams during rotation of the stem and key and force the wings outwardly of the collar against the wrist of the wearer.

5. In a wrist watch having a casing, a spring actuated alarm comprising a fiat stem projecting from the back of the casing, a key composed of a diametrically disposed bar having a central slot receiving the stern and wings on the bar projecting rearwardly of the back of the casing, said key being adapted to rotate the stem when winding the alarm spring, the stem being adapted to rotate the key when the alarm is released, a collar on the casing normally housing the wings, a spring maintaining the wings housed within the collar when the alarm has been set, and cams in the path of the bar and engaging the bar for forcing said bar outwardly along the stem and projecting the wings beyond the collar for engagement with the Wrist of the wearer when the alarm has been released.

AUGUSTUS BERNHARDT CHRISTENSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,483,768 Bickerton Feb. 12, 1924 2,223,243 Axelrod Nov. 26, 1940 

